Title :
A 2-V 2-GHz BJT variable frequency oscillator
Author :
Chen, Wei-Zen ; Wu, Jieh-Tsorng
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
9/1/1998 12:00:00 AM
Abstract :
A new LC-tuned negative-resistance variable-frequency oscillator (VFO) is described. Frequency tuning is accomplished by using a variable-impedance converter (VIC) to simulate the varactor function. A negative-impedance converter provides the necessary negative resistance for oscillation and also functions as the voltage level shifters for the VIC. A low-voltage translinear circuit is used to linearize the tuning characteristic of the VFO. Implemented in a 0.8 μm 12 GHz fT BiCMOS technology, the VFO has a tuning range from 1.55 to 2.02 GHz, while consuming 15 mA from a -2 V supply
Keywords :
BiCMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; impedance convertors; negative impedance convertors; negative resistance devices; variable-frequency oscillators; 0.8 micron; 15 mA; 2 GHz; 2 V; BJT variable frequency oscillator; BiCMOS technology; LC-tuned negative resistance VFO; frequency tuning; low-voltage translinear circuit; negative impedance converter; variable impedance converter; BiCMOS integrated circuits; Circuit optimization; Circuit simulation; Frequency conversion; Impedance; Local oscillators; Tuning; Varactors; Voltage; Voltage-controlled oscillators;
Journal_Title :
Solid-State Circuits, IEEE Journal of
